By adding excess Gypsum to cement,

Which of the following metals is inert towards reaction with $H_2O$?

Given below are two statements:
Statement $I$: None of the alkaline earth metal hydroxides dissolve in alkali.
Statement $II$: Solubility of alkaline earth metal hydroxides in water increases down the group.
In the light of the above statements,choose the most appropriate answer from the options given below:

Milk of magnesia is

The hydroxide of alkaline earth metal,which has the lowest value of solubility product $(K_{sp})$ at normal temperature $(25^{\circ} C)$ is

Which of the following alkaline earth metal nitrides is volatile?